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PES Amazonian XL Mycelium box (2100 ML)



The PES Amazonian XL-MyceliumBox is an enhanced Mycelium box with 80% more substrate than the medium Pes Amazonian box. The Pes Amazonian is known to produce huge mushrooms and highly potent ones they are!

This XL-Mycelium Box contains the mycelium of the Psilocybe cubensis 'PES Amazonian' strain. The Pes Amazonian mycelium is colonized on a substrate of rye and perlite. The top layer of the substrate is covered with vermiculite as casing layer.

Our online manual for the mushroom mycelium box can be viewed at www.mushroomgrowbox.org.
There are no paperclips included in the boxes.

Holding the double of the substrate, meaning the double of the expected PES Amazonian yield, the XL-MyceliumBox is an enhanced product allowing the formation of exceptionally big PES Amazonian magic mushrooms in an exceptional short amount of time.

Made for the amateur mycologist, the PES Amazonian XL-MyceliumBox highly reduces the probability of contamination and it's simplicity of processes will allow you to better focus on the amazing formation of mushrooms bodies. Made with the strongest redefined strains, growing mushrooms was never easier and more reliable.

Because the kits are fresh we recommend to set them up right away.

Mushroom Stopper - Bad Trip Stopper
If this will be the first time you use magic mushrooms, make sure that a sober friend is around to help you out in case you feel uncomfortable, sick or scared. Click here to buy our Mushroom Stopper. Our Mushroom Stopper, it helps you to get out of your trip.


We do NOT ship to countries outside the E.U.

If in doubt, please contact us and we will inform you if we will ship these XL mushroom boxes to you!!!

Mushroom growbox manual


Step 1
Wash your hands thoroughly and clean the outside of the grow kit with a clean, damp cloth. Remove the lid, but keep it for step 3.

Step 2
Fill the kit with water up to the edge of the kit (20 º C). Place the lid and let the mushroom growkit soak for 12 hours ( if this is your second flush you let the kit soak for 8 hours).

Step 3
After soaking, remove the lid of the grow kit and carefully pour off the water, until the last drop.

Step 4
Add warm water (20 º C) to the grow bag.

  • For the 2100cc grow kit: 2 cups (0,5 liters)
  • For the 1200cc grow kit: 2 cups (0.5 liters)
  • For the 250cc grow kit: 1 cup (0.25 liters)

Put the grow kit in the grow bag. Make sure the water does not go over the edge of the grow kit.

Step 5
Close the growing bag by folding the top of the bag and secure it with one or two paperclips (part of the grow kit package).

Step 6
Put the grow kit in a place out of direct sunlight but enough daylight, and not on or near a heater or heat source. The ideal temperature is between 20 and 25 º C. Make sure there is sufficient sunlight.

Step 7
The first mushrooms will be visible in 10 to 12 days.

Step 8
The mushrooms should be harvested just before the skin underneath the hats starts to loosen up.
The harvest: grab the stem gently and turn the mushroom to the left and than to the right and gently pull. This way you can remove the mushroom as complete as possible. This way you can reuse the grow kit.


Enjoy your shrooms!

new flight
After harvesting, clean the surface of the grow and remove the old and dead mushrooms, so the new mushrooms have the ability to grow. Put the grow kit for the best results in the refrigerator overnight. Caution! Not colder than 2 ° C.

Start again from step 2 for the next harvest.



  • The ideal climate is 22 º C.
  • Work very clean!
  • When using a heating mat, make sure there is between the heating mat and the growkit. (1 cm) 
  • Don't use a heating mat for temperatures above the 20 degrees. 
  • Try to avoid mushroom spores on the substrate, it will kill the mycelium.
PES Amazonian XL Mycelium box (2100 ML)


the delivery is really fast, but i got disappointed: every box i ordered was already used, THEY TOOK THE FIRST FLUSH!!!! Why i am so convinced about that? Well.. Its not my first time i am doing this and over the time experience is growing and the result is a good eye for the mycelium and the cake and this one is for 100% already used ones, topped with vermiculite in hope that newbies don't detect it..??

I fact; the first flush is one of the most potent.. but this is just one of the points, in the other hand the RISK of contamination is rising up because of your actions..!! This is BULLSHIT.

..Guys, really? Is that your job? Where is the quality, the passion, the trust in your work? Or got your minds infected by profit??
This is not a good way to make business, but anyway -karma is watching you.

all the best.

Evaluation: [out of 5 Stars]

Wollte 5 Sterne geben 5 oder sogar 10 wenn es gehen würde ⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐

Ich denke dem Typ vom 10.01.2019 ist das gleiche wir mir bei der Bewertung passiert. ⭐⭐⭐⭐⭐⭐⭐⭐⭐

Evaluation: [out of 5 Stars]

(Kurt Korte)
Wahnsinn erster flush 303g getrocknet 44g hat zwar fast 4 Wochen gedauert bis der erste flush angefangen hat zu wachsen aber dann 5 Tage später konnte man ernten. der nächste flush wächst schon 2 Tage nach dem ernten gings schon weiter. Die Pilze sind auch für mich die krasseste die ich je hatte. Hammer Trips, die besten pilze sind diese hier.
Evaluation: [out of 5 Stars]

I have to say these are the strongest mushies I have ever had and also an incredible yield !
After several experiences I would call myself definitely not an newbie psychonaut but when using the Amazonian's for the first time I was a bit overwhelmed when the trip started. Intense and incomparable body trippin followed by spectacular visual and acoustic hallucinations. After about one hour I had adjusted to the effects and could enjoy the trip very much.
All in all the best and most interesting experience I had !

Evaluation: [out of 5 Stars]

amazing trip fast and discret
Evaluation: [out of 5 Stars]

Just did my first harvest extremely happy with the results. Took a little longer to start growing. But huge yield. My other kit just started growing today. Definitely buying more kits soon.........
Evaluation: [out of 5 Stars]